Analysis of partial discharge in leading-out terminal on distribution switchgear

The paper conducts a simulation analysis on the electric field contribution of leading-out terminal based on the long running semi-insulating switchgear. The electric field distribution of leading-out terminal is obtained by using electrostatic field analysis with the software, ANSYS. The effects of water and dust are simulated by changing the dielectric constant of air considering the unpurified air. Then the variation laws of electric field distribution in leading-out terminal with dielectric constant of air are gained. In addition, considering the semi-conductive coating, the paper analyzes the effects of electric field on leading-out terminals.